Enable and Power-On Sequencing ........................................................................................................................ 31
Fault Detection, Shutdown, and Reporting............................................................................................................ 32
I
2
C Operation ........................................................................................................................................................ 36
Thermal Considerations and Board Layout ........................................................................................................... 42
........................................... –0.3V to 6V
SDA, SCL ......................................–0.3V to DV
DD
+ 0.3V
Operating Junction Temperature Range
(Note 2).................................................. –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
pin conFiguraTion
LTC3589
BUCK1_FB
LDO2_FB
TOP VIEW
LDO1_STBY
BUCK3_FB
BUCK2_FB
LDO1_FB
BB_FB
LTC3589-1/LTC3589-2
BUCK1_FB
LDO2_FB
TOP VIEW
LDO1_STBY
BUCK3_FB
BUCK2_FB
LDO1_FB
BB_FB
DV
DD
DV
DD
SW4CD
SDA
V
IN
40 39 38 37 36 35 34 33 32 31
V
IN_LDO2
1
LDO2 2
LDO3 3
LDO4 4
V
IN_LDO34
5
PV
IN1
6
SW1 7
RSTO
8
EN_LDO2 9
EN1 10
11 12 13 14 15 16 17 18 19 20
SW4AB
EN2
EN3
EN4
EN_LDO34
PV
IN4
BB_OUT
IRQ
SW4CD
PWR_ON
41
GND
30 SCL
29 PGOOD
28 VSTB
27 PV
IN3
26 SW3
25 SW2
24 PV
IN2
23 WAKE
22 PBSTAT
21
ON
V
IN_LDO2
1
LDO2 2
LDO3 3
LDO4 4
V
IN_LDO34
5
PV
IN1
6
SW1 7
RSTO
8
EN_LDO2 9
EN1 10
40 39 38 37 36 35 34 33 32 31
30 SCL
29 PGOOD
28 VSTB
27 PV
IN3
41
GND
26 SW3
25 SW2
24 PV
IN2
23 WAKE
22 PBSTAT
21
ON
11 12 13 14 15 16 17 18 19 20
EN2
SW4AB
EN3
EN4
EN_LDO3
PV
IN4
BB_OUT
IRQ
PWR_ON
UJ PACKAGE
40-LEAD (6mm
×
6mm) PLASTIC QFN
UJ PACKAGE
40-LEAD (6mm
×
6mm) PLASTIC QFN
T
JMAX
= 150°C,
θ
JA
= 33°C/W
EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB
T
JMAX
= 150°C,
θ
JA
= 33°C/W
EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3589EUJ#PBF
LTC3589IUJ#PBF
LTC3589HUJ#PBF
LTC3589EUJ-1#PBF
LTC3589IUJ-1#PBF
LTC3589HUJ-1#PBF
LTC3589EUJ-2#PBF
LTC3589IUJ-2#PBF
LTC3589HUJ-2#PBF
TAPE AND REEL
LTC3589EUJ#TRPBF
LTC3589IUJ#TRPBF
LTC3589HUJ#TRPBF
LTC3589EUJ-1#TRPBF
LTC3589IUJ-1#TRPBF
LTC3589HUJ-1#TRPBF
LTC3589EUJ-2#TRPBF
LTC3589IUJ-2#TRPBF
LTC3589HUJ-2#TRPBF
http://www.linear.com/product/LTC3589#orderinfo
PART MARKING*
LTC3589UJ
LTC3589UJ
LTC3589UJ
LTC3589UJ-1
LTC3589UJ-1
LTC3589UJ-1
LTC3589UJ-2
LTC3589UJ-2
LTC3589UJ-2
PACKAGE DESCRIPTION
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
SDA
V
IN
3589fh
For more information
www.linear.com/LTC3589
3
LTC3589/LTC3589-1/
LTC3589-2
elecTrical characTerisTics
SYMBOL
V
IN
I
STANDBY
f
OSC
I
VIN
PARAMETER
Operating Input Supply Voltage, V
IN
V
IN
Standby Current
Oscillator Frequency
Pulse-Skipping Mode V
IN
Quiescent Current
per Buck
Burst Mode
®
V
IN
Quiescent Current per Buck
Feedback Pin Input Current
Maximum Duty Cycle
SW Pull-Down Resistance
Soft-Start Rate
Maximum Feedback Voltage
Feedback LSB Step Size
Minimum Feedback Voltage
BxDTV1 = BxDTV2 = 00000,
V
IN
=
2.7V to 5.5V
l
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= PV
IN1
= PV
IN2
= PV
IN3
= PV
IN4
= V
IN_LDO2
= V
IN_LDO34
= DV
DD
= 3.8V. All regulators disabled unless otherwise noted.
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